allan dalzell



(No Model.)

J. A. DALZELL.

DOUBLE CARBON LAMP.

N0.308,595. Patented Dec. 2, 1884.

"MI v I UNITED STATES PATENT OFFICEO J. ALLAN DALZELL, OF NENV YORK, N. Y.

DOUBLE-CARBON LAMP.

SPECIE'ECATION forming part of Letters Patent No. 308,595, dated December 2, 1884.

Application filed May 24, 1883.

To (all; whom, it may concern:

Be it known that I, J. ALLAN DALZELL, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Double-Carbon Lamps, of which the following is a spcciiieation.

Myinvention relates to elcctric-arclamps of the kind known as double-carbon lamps, in which two sets of carbons are employed, and are combined with suitable mechanism where by one set may be kept out of action while the other is burning, but may be automatically thrown into action when the carbons of the set that is burning are nearly consumed, or when the are between them becomes abnormally long.

My invention is designed, in general, to im prove the simplicity and efficiency of this class of lamps, but more especially to furnish a simple and efficient lamp in which the are may be shifted automatically at any time from either set of carbons to the other in case of an abnormal increase in the length of are of the set in action, so as to produce a lamp that shall be double acting at any and all times, and not, as in many lamps of the general class referred to, restricted in its action and capable of shifting the are only from the set of carbons first burning to the other set, and then, as is generally the case, only when the carbons of the first set are consumed. My invention may, however, be applied in a lamp in which a shift from the first burning set to the other only is provided for.

My invention consists, first, in Combining with two sets of carbons, suitable means, electrical or mechanical, for preventing the carbons of one set from burning, an electro-magnet in a derived circuit around the other set of carbons for bringing the carbons of the one set into action by any suitable means, and an electric switch that serves to remove the currentfrom said electro-magnet simultaneously with its operation in shifting the are.

My invention consists, also, in the combination, with two sets of carbons, of a suitable shifting bar, lever, or other support, carrying a device whereby the one set of carbons may be brought into action, an electro-magnet in (No mo(lel.l

carrying or actuating the devices that control the operation of the two sets of carbons in such a way as to prevent the formation of an are, or at the proper time to allow an arc to be formed, two electromagnets acting on said lever in opposite directions, and placed, respectively, in derived-circuit connections around the two sets of carbons, and circuit-controlling devices, whereby the circuit of the mag net which throws the lever may be broken or I changed simultaneously with the operation, and the circuit of the other magnet may be completed or changed so as to put the latter into operative electrical connection with rela tion to the set of carbons rendered operative, while at the same time the other electro-mag net, which is for the time being in a derived circuit around the set from which the are is shifted, is rendered electricallyinoperative.

My invention consists, also, in the combination of a movable releasing-stop for a clamp or clutch of the carbon-carrier for one set of carbons, and an electro-magnet in a derived circuit around the other set of carbons for set ting said stop into position where the clutch or clamp may be released.

My invention consists, also, in the combination, with two sets of carbons, of feed clamps or clutches, or equivalent feed-controlling devices, releasing stops or detents mounted 011 a reciprocating support, electromagnets arranged in derived-circuit connections, and arranged to act on the support in turn and in opposite directions, and suitable means for electrically disconnecting the magnet, which is in a derived circuit around the set of carbons in action, and which throws the support to bring into action a new set of carbons, and connecting the other magnet into a derived connection around the set of carbons brought in.

My invention also consists in certain spccitied combinations of apparatus and devices to I be set out in the claims following the subj oined description.

As a preferred method of carrying my invention into practice, I propose to use, as a means of holding a carbon out of action or allowing it to come into action, a movable detent, releasingstop, or equivalent device for the feed-controlling mechanism,which is made movable, and is so arranged that in one position it will prevent the carbon-carrier from moving, but in another position will allow said carbon to feed when the magnet system of the lamp operates the controlling mechanism in the usual way. \Vith this movable stop, detent, or its equivalent is combined the do rivedeircuit magnet that serves to actuate the support for said step in such a way as to bring the stop or det'ent into operative position with relation to the feed controlling mechanism. I may, however, use any other means for holding a set of carbons out of action and preventing the are from forming as, for instance, an electric switch that serves to break the circuit for one set of carbons, or close the same when it is actuated by the magnet in the derived circuit around the other set.

Some of the methods or combinations and some of the various devices that may be used in carrying my invention into practice are shown in the accompanying drawings, in which- Figure 1 is a plan view of the magnet sys tem and the shitting-lever and its magnets. Fig. 2 is an elevation of the working parts of the lamp, and shows the form given to that portion of the shifting-lever that works under the clutch and constitutes in effect the rcleasing-stop for the clutch. Fig. 3 shows another form of clutch. Fig. 4-. illustrates the application of my invention to an electric switch for switching the two sets of carbons into or out of circuit.

Referring to Fig. 1, A indicates the plate which supports the lamp mechanism; B B, a fixed main-circuit electro-magnet of horseshoe form, and having the coils of wire upon its two legs.

0 0 indicate a similar derived-circuit electro-magnet, which is mounted by its crosspiece on arock-shatt, At, mounted on uprights rising from plate A, and provided with two crank-arms, D 1), one of which is shown in Fig. 2, and which are connected by links L L with two clutches, E E, for the carbon-earriers F F. The poles of the magnet G 0 project toward the poles of B B, and are arranged to swing in the face of the latter and to impart movement to the feed-regulating clutches or equivalent devices in substantially the manner set forth in my prior Patent No. 27 L916. In that patent the tails of the clutches rest upon the floor of the lamp, which floor is, in fact, a releasing-stop for the clutches. In the present case the releasingstops are supported by or formed on the ends of a lever, G, or

other suitable reciprocatory support, whichis beveled at points f f, as indicated, so that it may readily slip under the ends of the clutches, and when in position beneath the end of the clutch may act as a releasing stop therefor. The lever G is pivoted on a si'iitable support and swings in a horizontal plane, butis so arranged that it will engage with but one clutch at a time. \Vhen in engagement with one, it is out of engagement with the other, and vice versa. When it is out of releasing position with relation to a clutch, that clutch is unsupported save by the magnet system, and the movements of the latter are insntlicicnt to cause it to release its red, so that the rod remains locked from movement. The other clutch, whose tail is over the releasing-stop on the other end of lever G, will, however, be released in the ordinary way to cause a feed of its carbon-carrier. The lever G- is turned to bring the releasing-stop of one clutch or the other into releasing position by the action ol' two derived-circuit electro-magnets, 1T. 11", suit-ably supported and acting oppositely on an armature-lever, K, which extends from lever G between said magnets. Said magnets are here shown as arranged to be placed in a continuation of the derived circuit containing magnet O G through connection 5, which splits to said magnets, as indicated, the circuit of one or the other being completed by a switch, S, to the eontact- 'ioints Z Z, to which .the terminals of magnets 11 1F are connected,

while the switch-lever itself is connected with the wire 6, leading to the negative bindingpostof the lamp. In the position shown the circuit of magnet H is complete through Z and the switch-lever; but magnet it is out of circuit, its connections being broken at It. Switch S is suitably mounted on the plate A, and is provided with pins it 71 against which the armature lever impinges to throw the switch onto one or the other of the contacts, 1 l according to the direction in which it is thrown. The pole ends of the magnets have projections of some non-magnetic material. let into their "faces to prevent sticking ot' the armature. Iii the position of the parts shown the carrier F is locked, because the tree end of clutch E is unsupported, and,owing t0 the removal of its releasing-stop, eannotbe released during the movement of the magnet system in regulating the feed ol'the other carrier. Clutch E operates in the ordinary manner, its releasing-stop being in position. Magnet IP is in circuit and H out of circuit, while armature K in its extreme position is so far away from the magnet H that it is not operated thereby during ordinary fluctuations in the length of are. It", however, the are becomes abnormally long, owing to sticking ot" the carbon rod or from the feeding out of the carbon, at which time a suitable pin on the carbon rod prevents farther downward movement thereot', then magnet H becomes sul'liciently strong to draw armature K suddenly over, by which operation the stop for clutch E is withdrawn, so

ITO

that carrier F will be locked by its clutch, 1 serves, when in proper position, to release the and the releasing-stop for E is placed in operative position, so that carrierF may be fed in the ordinary way. At the same time the switch S is operated by the lever K striking a pin, 72, thus breaking the connection at l and completing the connection at l for magnet H, which is then ready to throw the lever and the stops back to the original position in case of abnormal increase in thelength of are of the pair of carbons then in action. The distance between the pins h h is such that the lever K will throw the switch S only when near the end of its movement in one direction or the other, so that the armature may complete its throw without interference from the magnetpole that it is leavin By this arrangement the light may be shifted automatically from either set of carbons to the other at any time in case the set in action fails to work properly.

I do not limit myself to any particular arrangement of the circuits of the magnets and switch, the idea and purpose being only to antomatically bring said magnets into operative electric condition with relation to the electric arc alternately and singly, and to cause an automatic shifting of the switch to throw out the magnet which draws the armature over and to throw in the magnet on the opposite side, so as to place the latter in condition for causing a reverse movement of the armature and the support for the releasing-stops or other devices that serve to throw the sets of carbons alternately and singly into and out of action, in case such reverse movement should be rendered necessary by an abnormal lengthening of the are between the set of carbons in action; nor do I limit myself to the employment of the movable releasing-stops for causing the alternate lock and release of the two sets of carbons, as any other devices may be em ployed which will when in one position lock a carboncarrier or carbon and when in another position allow said carrier to feed and act in the ordinary way.

It is obvious that the alternate locking and releasing might be accomplished by the ap plic. tion of suitable stops or locking devices to other forms of feed-controlling devices besides to ordinary clutches. The armature-lever and support Gr may be constructed and mounted in other ways, provided they be properly arranged to retain the position into which they are placed by the action of either magnet until drawn in the opposite position by the other.

Another form of clutch that might be used in place of those shown in Fig. 1 is shown in Fig. 3. In this figure, M M indicate two straps pressing against the carbon-carrier on one side, and on the other carrying a pivoted clutching toe or dog that has an extended arm, m, upon which a spring acts to normally hold the dog against the carrier and prevent it from feedin The clutch is supported by a link, Z, or other attachment to the magnet system. A stop, a, supported by lever L,

clutch when lowered; but when said stop is moved by the lever to one side into the position indicated the spring keeps the clutch in engagement with the carrier, and prevents the same from feeding.

Instead of mechanical devices for determining which of the two sets of carbons shall act, I may employ an electric switch to complete the circuit to one set of carbons and simulta neously break the circuit for the other set. Such an arrangement is shown in Fig. at, in which lever L or other reeiprocatory support carries two circuit-closing springs, 12 19, one of which makes connection with a contact point, 22, and the other with a contact-point, 2i. The lever is connected with the positive pole of the lamp, and the contact-points 22 2a with the carboircarriers F F and their carbons, respectively. In one position of the lever (that shown) the circuit of carbon-can rier F of one set is completed and the circuit of the other broken, and vice versa, in the other position of the lever The regulat ing-magnets are not shown, for the sake of simplicity, but they are placed in the circuit in the ordinary way, which need not be recited in detail. The main-circuit magnet might be in the connectingwire 9, and the derived-circuit magnet in the connecting-wire connecting the switch-lever S with the negative side of the lamp. In the one position of the parts the carrier 1* is in circuit, and the magnet which is adapted to throw the armature K, so as to bring the other set into circuit and throw the first set out, is in the de rived circuit around the carbons in action. 111 the other position the conditions are reversed, with the obvious result of rendering the apparatus capable of shifting the light from either set of carbons to the other auto matically in case the set in action fails to opcrate properly.

The parts are suitably proportioned to preserve the general circuit as the lever Gshifts.

I' have herein described a breaking of the circuits containing the magnets and the car bons; but itis obvious that the same results might be accomplished by a shortcircuiting of the parts, in a manner well understood by electricians.

I do not limit myself to any particular construction of mechanism or form of individual parts, as the same may be varied in many ways.

()ther magnet systems may be employed, and other feed-regulating devices made use of.

What I claim as my invention is 1. The combination, in an electric lamp, of two sets of carbons, suitable means for pre venting one set of carbons from burning while the other set is in action, an electro-magnet in a derived circuit around the latter set for bringing the first-named set into action when the are resistance of the set in action reaches a predetermined point, and an electric switch controlling the circuit of said electro-magnet,

and actuated thereby so as to remove the cur rent from said electro-magnet simultaneously with the shifting of the are from the one set of carbons to the other.

2. The combination, in an electric lamp, of two sets of carbons, a reciprocating lever controlling suitable means whereby a set of carbons may be brought into or out of action, electro-inagnets acting 011 said lever in opposite directions and placed in derived-circuit connections around the carbons, and an electric switch controlling the circuits of said electromagnets in the manner described, so as to throw out the magnet which actuates the lever, and to throw the other magnet into a derived circuit around the set of carbons brought into action.

The combination, with two sets of carbons, of means for locking and releasing one set of carbons, an electroanagnet in a derived circuit around the other set of carbons l'or effecting the release of the first set, and an electric switch for automatically cutting out or short circuiting said magnet simultaneously with the release of the carbons thereby.

4. In a double-carbon lamp, the combina tion, with a carbon-carrier for one set of can bons, of a clutch or clamp, a movable releasing-stop therefor normally held out of releasing position, and an actuating electro-magnet for throwing said releasing-stop into releasing position, said electromagnet being placed in a derived circuit, which is closed around the other set ol'carbons, while such set is in action.

5. The combination, with two sets of carbons, of feed clamps or clutches therefor, releasing-stops for said clamps mounted on a reciprocating support actuating the same in opposite directions, and arranged in derived circuits around the carbons, and means for breaking the derived circuit of a magnet simulta neously with the movement of the reci n'ocating support thereby, and at the same time closing the derived circuit containing the other magnet.

(i. The combination, with two carbon-carriers, of feed-controlling mechanism therefor, a reciprocating lever or other support for the releasing devices of said mechanism, and arranged in the manner described, so as to allow the operation of but one feed-controlling mechanism at a time, derivedcircuit electromagnets for actuating said support in derived circuit connect-ions around the carbons, and an electric switch for throwing one of said mag nets into circuit and the other out of circuit, as and for the purpose described.

7. The combination, with two carbon-carriers, of feed clamps or clutches therefor, a re ciprocating feed-shifting bar or support, two electro-inagnets for operating said support in opposite directions, placed, respectively, in derived-circuit connections around the carbons, and suitable circuit-controlling devices for admitting the electric current to either of said electro-magnets simultaneously with the operation of the support by an abnormal increase in the length of arc in the set with which the other is connected, as and for the purpose set forth.

S. The combination, with the two carboncarriers, of the two clutches, the reciprocating lever carrying the releasing-storm, and the two electro-magnets in derived circuits, respectively, around the carbons, and provided with means for automatically switching them into and out of circuit.

9. The combination, with two sets of car bons, of a reciprocating light-shifting lever, two clcctro -magnets in derived-circuit connections, and two circuit-controlling points, whereby the current may be admitted to said electro magnets separately and in turn.

10. The combination, in a doublecarbon lamp, of two sets of carbons, a shifting-lever,

G, two electro-magnets, H11, acting thereon in opposite directions, and an automatic circuit-controlling switch for removing the electric current from the magnet which throws the lever, and simultaneously admitting current to the other magnet.

11. The combination of the feed-shifting le ver G, electro-magnets H11 connected to a derived circuit around. the carbons, and an electric switch, S, as and for the purpose described.

12. In a double-carbon lamp, the combina tion of a movable releasing-stop for the clutch or clamp of one set of carbons, and an elect-romagnct in a derived circuit around the other set of carbons for setting said stop into position where the clamp or clutch may be released.

Signed at New York, in the county of New York and State of New York, this 13th day of April, A. I). 1883.

J'. ALLAN DALZELL.

\Vitnesses:

G150. 0. (Johnn Trios. TOOMEY. 

